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From: Apache Wiki <wikidiffs@apache.org>
To: Apache Wiki <wikidiffs@apache.org>
Date: Fri, 01 Apr 2011 17:29:34 -0000
Message-ID: <20110401172934.96841.45674@eos.apache.org>
Subject: =?utf-8?q?=5BSolr_Wiki=5D_Update_of_=22SchemaXml=22_by_YonikSeeley?=

Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Solr Wiki" for chan=
ge notification.

The "SchemaXml" page has been changed by YonikSeeley.
The comment on this change is: fix broken links, de-clutter by moving out T=
ODOs, remove JIRA references.
http://wiki.apache.org/solr/SchemaXml?action=3Ddiff&rev1=3D44&rev2=3D45

--------------------------------------------------

  The schema.xml file contains all of the details about which fields your d=
ocuments can contain, and how those fields should be dealt with when adding=
 documents to the index, or when querying those fields.
  =

  A [[http://svn.apache.org/viewvc/lucene/dev/trunk/solr/example/solr/conf/=
schema.xml?view=3Dmarkup|sample Solr schema.xml with detailed comments]] ca=
n be found in the Source Repository.
- =

- /!\ :TODO: /!\ we should try to make a DTD for the schema
  =

  <<TableOfContents>>
  =

@@ -25, +23 @@

  =

  `TextField`s can also support Analyzers with highly configurable [[Analyz=
ersTokenizersTokenFilters|Tokenizers and Token Filters]].
  =

- /!\ :TODO: /!\ do omitNorms and positionIncrementGap have any meaning for=
 non !TextFields?
- =

  Field types that store text (`TextField`, `StrField`) support compression=
 of stored contents:
  =

   * `compressed=3Dtrue|false`
@@ -35, +31 @@

  `compressThreshold` is the minimum length required for text compression t=
o be invoked.  This applies only if `compressed=3Dtrue`; a common pattern i=
s to set `compressThreshold` on the field type definition, and turn compres=
sion on and off in the individual field definitions.
  =

  =3D=3D=3D Poly Field Types =3D=3D=3D
- /!\ Solr1.5 /!\ See https://issues.apache.org/jira/browse/SOLR-1131.  Thi=
s discusses uncommitted code.
- =

  Some !FieldTypes can be "poly" field types.  A Poly !FieldType is one tha=
t can potentially create multiple Fields per "declared" field.  The primary=
 example in Solr is the PointType.  Depending on the dimension specified, o=
ne or more Fields will be created.  For example:
  =

  {{{
@@ -133, +127 @@

  =3D=3D=3D The Default Search Field =3D=3D=3D
  The `<defaultSearchField>` is used by Solr when parsing queries to identi=
fy which field name should be searched in queries where an explicit field n=
ame has not been used.
  =

- /!\ :TODO: /!\ check whether this option is also used by the DisMaxReques=
tHandler and not only by the StandardRequestHandler
+ =

  =

  =3D=3D=3D Default query parser operator =3D=3D=3D
  The default operator used by Solr's query parser ([[http://lucene.apache.=
org/solr/docs/api/org/apache/solr/search/SolrQueryParser.html|SolrQueryPars=
er]]) can be configured with <solrQueryParser defaultOperator=3D"AND|OR"/>.=
  The default operator is "OR" if unspecified.
@@ -156, +150 @@

  =3D=3D=3D Similarity =3D=3D=3D
  A `<similarity>` declaration can be used to specify the subclass of Simil=
arity that you want Solr to use when dealing with your index.  If no Simila=
rity class is specified, the Lucene !DefaultSimilarity is used.  Please see=
 SolrPlugins for information on how to ensure that your own custom Similari=
ty can be loaded into Solr.
  =

+ =3D=3D=3D TODO =3D=3D=3D
+ * Perhaps make a DTD for the schema.
+ * Talk about omitNorms and positionIncrementGap wrt text fields
+ * check whether defaultSearchField is also used by the DisMaxRequestHandl=
er and not only by the StandardRequestHandler
+=20